From a846e9cd2b991b2b6f895b45f0a2af1ce2c994bc Mon Sep 17 00:00:00 2001
From: hunt <hunt>
Date: Wed, 14 Mar 2007 16:11:30 +0000
Subject: 2007-03-14  Martin Hunt  <hunt@redhat.com>

	* staprun.c: Renamed from stpd.c. Removed quiet and print_only
	options. Added "-x" option as an alias for "-t". Removed "-m"
	option. Updated arg processing to leave 4 slots for modoptions[].
	Bump the priority of staprun.
	* ctl.c: New. Transport control channel functions.
	* relay.c: New. Relayfs control functions for new transport.
	* relay_old.c: New. Relayfs control functions for older
	versions of relayfs.
	* mainloop.c: New. Staprun main loop.
	* staprun.h: Renamed from librelay.h. Cleaned up.

	* stap_merge.c: Renamed. Updated for modified save format.
---
 runtime/staprun/ctl.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 runtime/staprun/ctl.c

(limited to 'runtime/staprun/ctl.c')

diff --git a/runtime/staprun/ctl.c b/runtime/staprun/ctl.c
new file mode 100644
index 00000000..9336631c
--- /dev/null
+++ b/runtime/staprun/ctl.c
@@ -0,0 +1,40 @@
+/* -*- linux-c -*-
+ *
+ * ctl.c - staprun control channel
+ *
+ * This file is part of systemtap, and is free software.  You can
+ * redistribute it and/or modify it under the terms of the GNU General
+ * Public License (GPL); either version 2, or (at your option) any
+ * later version.
+ *
+ * Copyright (C) 2007 Red Hat Inc.
+ */
+
+#include "staprun.h"
+
+int init_ctl_channel(void)
+{
+	char buf[128];
+	struct statfs st;
+
+ 	if (statfs("/sys/kernel/debug", &st) == 0 && (int) st.f_type == (int) DEBUGFS_MAGIC)
+ 		sprintf (buf, "/sys/kernel/debug/systemtap_%d/cmd", getpid());
+	else
+		sprintf (buf, "/proc/systemtap_%d/cmd", getpid());
+
+	dbug("Opening %s\n", buf); 
+	control_channel = open(buf, O_RDWR);
+	if (control_channel < 0) {
+		fprintf(stderr, "ERROR: couldn't open control channel %s: errcode = %s\n", buf, strerror(errno));
+		return -1;
+	}
+	return 0;
+}
+
+void close_ctl_channel(void)
+{
+	if (control_channel > 0) {
+		close(control_channel);
+		control_channel = 0;
+	}
+}
-- 
cgit